辺材
「辺材」の一例を描いたイラストです。
Sapwood in a young black walnut trunk cross-section (Juglans nigra)
すべての言語
ベータ版。イラストはAIで生成されており、翻訳は言語チェック中です。
参考資料
- US Forest Products Laboratory Wood Handbook — sapwood is the active water-conducting, lighter-colored wood adjacent to bark
- USDA Forest Service technology-transfer sheet — black walnut sapwood is nearly white and contrasts with chocolate-brown heartwood
- University of Illinois Extension — eastern black walnut commonly has ten to twenty annual growth rings in its sapwood